Total body water, electrolyte, and thermoregulatory responses to ad libitum water replacement using two different water delivery systems during a 19-km route march
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Date
Authors
Nolte, Heinrich Wilhelm
Nolte, Kim
Van der Meulen, Julia
Journal Title
Journal ISSN
Volume Title
Publisher
Lippincott Williams and Wilkins
Abstract
Hands-free hydration systems are often advocated for improved hydration and performance in military populations. The aim was to assess whether such systems indeed result in improved hydration in exercising soldiers. Subjects were required to complete a route march while consuming water ad libitum from either a hydration bladder (BG) or traditional canteen (CG). Water intakes of 538 ml·h⁻¹ (BG) and 533 ml·h⁻¹ (CG) resulted in no differences for changes in body mass, serum [Na], plasma osmolality, total body water, or time required to complete the march. There were no differences between peak exercise core temperature of the BG (38.9° C) and CG (38.7° C) groups. There were no differences between the groups for fluid balance, thermoregulation, or performance. This is a not a surprising finding because the amount of fluid consumed ad libitum is determined by changes in serum osmolality and not the fluid delivery system as often proposed.
Description
Keywords
Total body water, Electrolyte, Thermoregulatory responses, Military populations, Hydration bladder (BG), Traditional canteen (CG)
Sustainable Development Goals
Citation
Nolte, HW, Nolte, K & Van der Meulen, J 2015, 'Total body water, electrolyte, and thermoregulatory responses to ad libitum water replacement using two different water delivery systems during a 19-km route march', Journal of Strength and Conditioning Research, vol. 29, Suppl 11, pp. S99-S93.